The coating machine is used for the coating production of BOPP sealing adhesive tape. Coat the rolled substrate with a layer of specific functional adhesive, coating, or ink, and dry it before winding. It adopts a dedicated high-speed coating head, which can effectively reduce the generation of bubbles. The unwinding and unwinding of the coating machine are equipped with a full speed automatic film bonding mechanism and tension closed-loop automatic control.
The workflow of the coating machine:
Coat the rolled substrate, such as paper, cloth, leather, aluminum foil, plastic film, etc., with a layer of specific functional adhesive, coating or ink, and dry before winding.
Working principle of automatic coating machine:
The working principle of the automatic coating machine used for screen printing plate making is the same, but its performance varies depending on different models and manufacturers. The screen coating machine is equipped with a device that can clamp the screen frame on the vertical frame. The front and back of the screen area are horizontal coating mechanisms, which consist of coating grooves and mechanical or pneumatic components that control the angle and pressure of the coating grooves. The two ends of the coating mechanism are mounted on the vertical support arm of the coating machine, and the coating mechanism is driven up and down by a belt, chain, or cable to apply along the surface of the wire mesh. The transmission mechanism is connected to a servo or variable frequency motor to ensure smooth operation and precise control of the position of the coating mechanism.
Before coating, install the clean and stretched screen from the front of the coating machine, and some models can also install the screen from the side. In models designed for large format mesh frames, side mounting is more common because the mesh frame is large and bulky, and side mounting can reduce lifting and movement. When the automatic screen coating machine is operated in conjunction with other automatic screen processing equipment such as cleaning equipment, regeneration equipment, drying devices, and developing machines, it is more convenient to install the plate from the side. No matter how the screen is installed, once the screen is in the correct position, the pneumatic or mechanical clamping device will close and lock the screen.
For the convenience of operation, many models have foot pedals to control the clamping action of the plate, allowing operators to free up their hands to control the screen. After installing the screen, pour the corresponding photosensitive emulsion into the automatic coating machine and start coating. According to the functions of the control system and equipment, the equipment can simultaneously coat both sides of the screen.
There are two ways of coating: one is to apply photosensitive emulsion on the screen through multiple wet pressing operations; Or add a drying process after each coating. The mechanical process of quantitatively coating liquid (or molten) polymer materials such as adhesives or coatings on the surface of materials. Suitable for the production of flexible substrates such as PVC/PE film, simply put, it is to apply adhesive onto the film. Specifically, it includes gluing, drying, winding, and tension control. The film can be made of PVC, PE, PET... or some paper, such as hot melt adhesive coated on release paper. The coating machine is designed and manufactured to meet the packaging requirements of containerized storage, transportation, and mechanized loading and unloading operations of goods. A series of products including tray type coating machines, top press type anti pull type coating machines, and pre pull type automatic film coating machines are widely used for container costs in foreign trade exports, food and beverage, filling, papermaking, dyes, plastic chemicals, glass ceramics, mechanical and electrical castings, improving production efficiency, preventing damage to goods during transportation, and playing a role in dust prevention, moisture prevention, and cleaning.
The working principle of coating machinery is to place the object to be wound in the center of the turntable, start the turntable motor to rotate, naturally drive the turntable to rotate, and make the object realize the outer wrapping film machine. At the same time, the elevator motor also starts, driving the entire assembly of the winding and bundling machine to move up and down, achieving winding in the height direction of the object, thus realizing the wrapping and packaging of the entire surface of the object. This is not only beneficial for the packaging requirements of goods storage, transportation, and mechanized loading and unloading operations, but also prevents damage to goods during transportation, plays a role in dust prevention, moisture prevention, and cleaning, reduces production costs, and improves production efficiency. The main focus during the winding process is on adjusting the tension of the film and threading it through. Generally, the degree of film tension can be achieved by adjusting the speed of the turntable and the speed of the motor. As long as we know that the faster the turntable speed and the slower the motor rotation, the tighter the film will be, and vice versa, the looser the film will be. This principle is not difficult to operate. Application of coating machine: Suitable for shoe materials, electronics industry, sponge EVA、PE、 Apply glue to fabrics and other materials.
